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| author | Alexander Aring <alex.aring@gmail.com> | 2015-09-02 14:21:29 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-09-17 13:20:04 +0200 |
| commit | 54552d03023cfd485cedf8d7471d1554139d58aa (patch) | |
| tree | 9e624523707527367ae0c385bcc6445117c6bd07 /net/ieee802154/6lowpan | |
| parent | ieee802154: 6lowpan: add check for reserved dispatch (diff) | |
| download | linux-54552d03023cfd485cedf8d7471d1554139d58aa.tar.xz linux-54552d03023cfd485cedf8d7471d1554139d58aa.zip | |
ieee802154: 6lowpan: check on valid 802.15.4 frame
This patch adds frame control checks to check if the received frame is
something which could contain a 6LoWPAN packet.
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/ieee802154/6lowpan')
| -rw-r--r-- | net/ieee802154/6lowpan/rx.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c index 45ce121369c2..f7eb091203a8 100644 --- a/net/ieee802154/6lowpan/rx.c +++ b/net/ieee802154/6lowpan/rx.c @@ -11,6 +11,7 @@ #include <linux/if_arp.h> #include <net/6lowpan.h> +#include <net/mac802154.h> #include <net/ieee802154_netdev.h> #include "6lowpan_i.h" @@ -280,6 +281,13 @@ static inline bool lowpan_is_reserved(u8 dispatch) */ static inline bool lowpan_rx_h_check(struct sk_buff *skb) { + __le16 fc = ieee802154_get_fc_from_skb(skb); + + /* check on ieee802154 conform 6LoWPAN header */ + if (!ieee802154_is_data(fc) || + !ieee802154_is_intra_pan(fc)) + return false; + /* check if we can dereference the dispatch */ if (unlikely(!skb->len)) return false; |